I posted this yesterday but got no results... I have a green mandarin dragonet, female, been in my tank for about 2 months... I have a 75 gallon reef with a well established pod population. She has been eating regularly, both pods and mysis. All water parameters are great and have been for some time. Several days ago I noticed a large white or clear blister like lump on one side, about a half inch or so away from the fin. She was still swimming normally and eating. You can see a youtube video of it here: https://www.youtube.com/watch?v=v2V8AReusrA
Yesterday I noticed that it appeared to have popped, and is now more of a hole/crater. I am unfortunately at work for 24 hours today, so I cant say the condition of the fish today. Here is a video of the hole/crater. https: https://www.youtube.com/watch?v=d8-zdbR8Ng4
If anyone has any ideas what it is, how i can treat it, and if it will spread, please let me know ASAP!
Yesterday I noticed that it appeared to have popped, and is now more of a hole/crater. I am unfortunately at work for 24 hours today, so I cant say the condition of the fish today. Here is a video of the hole/crater. https: https://www.youtube.com/watch?v=d8-zdbR8Ng4
If anyone has any ideas what it is, how i can treat it, and if it will spread, please let me know ASAP!

